What is the density of pewter?

7,300 kg/m³ (7,100–7,500), or 7.30 g/cm³.

No. At 7,300 kg/m³ it is denser than water.

Pewter

Density of pewter

7,300 kg/m³ (7,100–7,500)

7.30 g/cm³ · 455.7 lb/ft³

Modern pewter is about 92% tin with copper and antimony; the lead that gave old pewter its dull grey colour and its toxicity has been out of food-contact pewter since the 1970s. It melts below 230 °C, so it can be cast in silicone rubber moulds on a kitchen stove, which is why hobby figure casting uses it. It is soft enough to dent with a thumbnail and creeps under load, so pewter is never structural.

Properties

Density: 7,300 kg/m³ (7,100–7,500) — 7.30 g/cm³
Melting range: 170–230 °C
Tensile strength: 40–70 MPa
Young's modulus: 44 GPa
Floats in water: No
Magnetic: No

What it is used for

Tankards, plates and giftware
Miniature figures and game pieces
Costume jewellery castings
Organ pipes (historically)

How it compares

Water is 1,000 kg/m³. Anything with a shorter bar than water floats in it.

air 1.2 kg/m³

expanded polystyrene foam 20 kg/m³

rigid polyurethane foam 40 kg/m³

Water — the float line 1,000 kg/m³

pewter 7,300 kg/m³

tungsten 19,250 kg/m³

gold 19,300 kg/m³

platinum 21,450 kg/m³

Water is 1,000 kg/m³. Anything below that floats.
Material	Density	Relative to water
rigid polyurethane foam	40 kg/m³	0.04×
expanded polystyrene foam	20 kg/m³	0.02×
air	1.2 kg/m³	0.00×
pewter ←	7,300 kg/m³	7.30×
platinum	21,450 kg/m³	21.45×
gold	19,300 kg/m³	19.30×
tungsten	19,250 kg/m³	19.25×

Does it rust?

Pewter does not rust — rust is iron oxide specifically — but it does corrode, forming its own oxide or salts over time.

Is it magnetic?

Pewter is not ferromagnetic. It is often assumed to be because it is a metal, but most metals are not — only iron, nickel, cobalt and a few alloys are attracted to an ordinary magnet.

Common questions

What is the density of pewter?: 7,300 kg/m³ (7,100–7,500), or 7.30 g/cm³.
Does pewter float?: No. At 7,300 kg/m³ it is denser than water.
Is pewter magnetic?: Pewter is not ferromagnetic. It is often assumed to be because it is a metal, but most metals are not — only iron, nickel, cobalt and a few alloys are attracted to an ordinary magnet.

Does pewter float? No
Mild steel 7,850 kg/m³
Stainless steel 304 8,000 kg/m³
Brass 8,500 kg/m³
Gray cast iron 7,150 kg/m³
High-carbon steel 7,850 kg/m³
Stainless steel 316 8,000 kg/m³
Aluminum 6061 2,700 kg/m³
Bronze 8,800 kg/m³

Sources

Typical range compiled from manufacturer specifications — At One Place

How these figures are compiled and checked